Lagrangian mechanics has proven to be the most elegant theoretical method in solving dynamic problems with constraints, transforming Newtonian mechanics analytically using algebra and calculus; d/dt(∂L/∂q̇ₖ) - ∂L/∂qₖ = 0 Where; L - Lagrangian of the system ( L = T - V) T - Kinetic energy V - Potential energy qₖ - Generalized coordinates k = 1,2,…,N Today we mark the 209th death anniversary of one of the brilliant minds in history, fundamental figure in the development of classical mechanics, mathematician and astronomer Joseph-Louis Lagrange who died on this day, 10th April 1813 in Paris, French Empire.